<template>
  <div>
    <!-- 修改头像 -->
    <div class="total" style="text-align: center;">
      <div class="block" style="margin: 30px 0;">
        <el-avatar style="height: 130px;width:130px;" src="https://cube.elemecdn.com/3/7c/3ea6beec64369c2642b92c6726f1epng.png"></el-avatar>
        <p style="color: #999999; font-size:14px;margin-top: 7px;">当前头像</p>
      </div>
      <el-upload
        class="avatar-uploader"
        action="https://jsonplaceholder.typicode.com/posts/"
        :show-file-list="false"
        :on-success="handleAvatarSuccess"
        :before-upload="beforeAvatarUpload">
        <img v-if="imageUrl" :src="imageUrl" class="avatar">
        <i title="上传图片" v-else class="el-icon-plus avatar-uploader-icon"></i>
      </el-upload>
      <el-form style="margin-top: 20px;">
        <el-form-item>
          <el-button type="info" @click="renew()">更新头像</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        imageUrl: ''
      };
    },
    methods: {
      handleAvatarSuccess(res, file) {
        this.imageUrl = URL.createObjectURL(file.raw);
      },
      beforeAvatarUpload(file) {
        const isJPG = file.type === 'image/jpeg';
        const isLt2M = file.size / 1024 / 1024 < 2;

        if (!isJPG) {
          this.$message.error('上传头像图片只能是 JPG 格式!');
        }
        if (!isLt2M) {
          this.$message.error('上传头像图片大小不能超过 2MB!');
        }
        return isJPG && isLt2M;
      }
    }
  }
</script>

<style lang="scss" scoped>

</style>
<style>
  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>